/*
 * acm1608.c
 *
 *  Created on: 11 Apr 2010
 *      Author: xuxu
 */

#include<stdio.h>
int main()
{
	double a,b,r1,r2;
	double len,r;
	while(scanf("%lf%lf%lf%lf",&a,&b,&r1,&r2)!=EOF)
	{
		len=a>b?b:a;
		r=r1>r2?r1:r2;
		if(len>=(2*r+0.01))
		{
			printf("Yes\n");
		}
		else
		{
			printf("No\n");
		}
	}
	return 0;
}
